@article{98064e13a2ed443c978b2bafc735678b,
title = "Dilepton production in the SMEFT at O (1 / Λ4)",
abstract = "We study the inclusion of O(1/Λ4) effects in the Standard Model effective field theory in fits to the current Drell-Yan data at the LHC. Our analysis includes the full set of dimension-6 and dimension-8 operators contributing to the dilepton process, and is performed to next-to-leading-order in the QCD coupling constant at both O(1/Λ2) and O(1/Λ4). We find that the inclusion of dimension-6 squared terms and certain dimension-8 operators has significant effects on fits to the current data. Neglecting them leads to bounds on dimension-6 operators off by large factors. We find that dimension-8 four-fermion operators can already be probed to the several-TeV level by LHC results, and that their inclusion significantly changes the limits found for dimension-6 operators. We discuss which dimension-8 operators should be included in fits to the LHC data. Only a manageable subset of two-derivative dimension-8 four-fermion operators need to be included at this stage given current LHC uncertainties.",
author = "Radja Boughezal and Emanuele Mereghetti and Frank Petriello",
note = "Funding Information: We thank S. Alioli for many stimulating conversations and for help with the implementation of dimension-8 operators in POWHEG . R. B. is supported by the DOE Contract No. DE-AC02-06CH11357. E. M. is supported by the U.S. Department of Energy through the Office of Nuclear Physics and the LDRD program at Los Alamos National Laboratory. Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of U.S. Department of Energy (Contract No. 89233218CNA000001). F. P. is supported by the DOE Grants No. DE-FG02-91ER40684 and No. DE-AC02-06CH11357. This research was supported in part through the computational resources and staff contributions provided for the Quest high performance computing facility at Northwestern University which is jointly supported by the Office of the Provost, the Office for Research, and Northwestern University Information Technology. Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = nov,
day = "1",
doi = "10.1103/PhysRevD.104.095022",
language = "English (US)",
volume = "104",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "9",
}